Lubricating-oil pump



Patented 6, 1925. UNITED STATES, PATENT oEFlcE.

' OTTO HAJEK AND EMANUEL BLAUHORN, or vIENNA,-AUSTRIA.

LUBRIcATING-OIL BUMP. i

Application filed April 3, 1922. Serial No; 549,158.

ToA allfwhom t may Gomera: I piston cylinder during the suction stroke of Be 1t .known that we, 4O'rro HAJEK and the pumping piston 8 whereas, onthe de- EMANUEL BLAUHonN, citizens of the Republivery stroke ofg the pumping piston 8 the `provements in Lubricating-Oil Pumps,'of

' alternately.

lic of Austria, residing at Vienna, Austria, said oil is forced from the same connection have invented certain new and useful Imalternately into the duct 6 and the duct 7. In the oil vessel there is located a shaft whlch the following is a specification. 11 and on this shaft there is mounted rota- This invention relates to valveless lubri- ,tably a lever 12 which is suitably connected eating oil pumps having two cylinders ar, to the distributing piston by 'means of. one

.ranged in one casingQ-.One of the cylinders, arm 12a and is provided with a second and (the pumping cylinder), contains the pumpsuitably recessed arm 12b in which the eccening piston, while the other cylinder (the distric 13 is located. The eccentric 13 is lfixed tributing cylinder) contains the distributing to a shaft 14.

piston, and the motion/of the two pistons .is The pumping piston 8 is connected to an such that the pumping piston makes twice as arm 15a of the lever 15; the other arm of this many strokes as the distributing piston'` so lever is forked and at the ends of the fork that two oil ducts can be supplied with oil On the shaft 14 and fixed to it is also a The motion of the two pistons is produced doubletappet 18. This double tappet has by means of two levers mounted rotatably relatively t0 the two rollers 16, 1-7, a posion an axle. The distributing piston is actution' such that when itrotates it isin con-` ated by `one arm of one lever, the other arm tact with only one roller, and comes into l of which is driven by an eccentric fixed to -contact with the -other roller only when it a shaft whereby the said 'has`V come out of contact with the other roller.

The said rollers are provided for the purpiston receives its to-and-fro motion.

The motion `,of the pumping piston is proz duced by a second lever which is mounted pose of diminishing friction but they are I tappet in five positions which are assumed v"ducts 6 and 7 for the exit of the oil. 8' is tappe piston receives a positive to-,and-fro moon the same shaft and` which is suitably con\ not indispensable for the operation of the nected by Van arm to the pumping piston apparatus and in their stead the two parts QI while the second arm is forked and is actuthe lever 15 facing the tappet may be arranged ated by means of 'a double tappet,so that the to be conducted or actuated by the said tappet. On following the rotational motion of tion.

An embodiment of this invention is' illustrated by way of example in the accompanying drawings in which Figure 1 is a longitudinal section of the .improved lubricating'oil pump, and

F igure 2 is a cross-section thereof.

f Figures 3, 4, 5, 6 and 7 illustrate the the double tappet in Figures 3, 4, 5, 6, and 7, it will be seen that the lever 15, and consequently also the pumping piston /8 are positively actuated in the direction of the movement of the deliveryy stroke of the pumping piston, as well as in the direction of the suction stroke of this piston.

In Figures 3 to 7, the lever arm 15a for double '7tappet and show diagrammatically connecting the pumping piston, as shown the rocking lever actuated by saiddouble diagrammatically has a simple line. p'

Figure 3 shows theposition of the double by thecdouble. tappetl and the lever vdurir-lg tappet 18 where the arm 15 ofthe lever has one complete revolution of the tappet shaft. reached its lowest point, and contact of 1 vis the oilvessel; this oil vessel contains the rising face of the tappet with the roller the casing of the lubricating pump 2. In 17 is just ceasing'.v In .this position the this vcasing are the distributing piston cvldouble tappet is not yet in contact with the 'inder A8, the pumping piston cylinder 4, the roller 16.

Figure 4 shows the position of a double .t in which it has already quitted the the pumping piston; 9 is the distributing roller 17 of the lever and has come into conduct 5 for the admission yofthe oil, and the .'piston; -10 is the connection between the tact with the roller 16. y At'this stage it be- `pumping piston -cyllnder andthe distributgins to actuate the roller' 16 l.for the purpose lng piston cylinder through which the oil of raising thearm 15a.

passes from the oil vesselv into the pumping Figure 5 shows the double 4tappet; and the i are mounted two anti-friction rollers 16, 17.

loisv lever-in a position in which the arm 15* has already completed a part of the upward movement, which upward'movement attains the highest degree when the double tappet begins to move out of contact with the roller 16 as is shown in Figure '6 for the purpose of coming again into contact with a roller 17 in continued rotation.

Figure 2 shows the lubricating apparatus comprising a plurality of lubricating pumps. In this construction ytwo eccentrics 13 are provided and also two arms 12n which are connected/to ether by a bar 19 so that engagement with the distributing piston is effected by means of the bar 1 9.

1. In a lubricating pump, a pumping cylinder, a pumping piston arranged in said cylinder, a rocking lever having a first arm for, actuating said pumping piston and a second forked arm, a shaft, and a double tappet fixed on said shaft and located insuch position relatively to said forked arm as to contact with the two ends of the fork of the lever in succession and thereby move one end of said fork in one direction and the other end of said fork in the other direction, each half of the double tappet being capable of alone reciprocating the piston positively once, so that two reciprocations of the piston occur at each complete revolution of the double tappet.

2. A lubricating pump as claimed in claim 1 in which the ends of the forked arm and tappet are so arranged that each tappet con; tacts withone end portion of said arm only after the other ta pet has released contact portion of said arm. f

3. In a lubricating pump, a pumping cylinder, a pumping piston arranged therein, a. rocking lever having an arm engaging said piston, a forked arm part of said lever,

'a rotatable shaft, and a substantially elliptical cam arranged on said shaft and forming a double tappet designed to successively engage the tines of the forked arm for causing positive movement of-the piston inopposite directions, each half of the double tappet being capable of alone reciprocating the piston positively once, so that two reciprocations of the piston occur at each complete revolution of the double tappet.

4. A. lubricating pump including a casing, a pumping cylinder and a distributing cy1- inder arranged in said casing, a port plac,

on said shaft and engaging said distributing l piston, a second lever mounted on said shaft and engaging the pumping piston, a forked arm forming part of the second lever, a second shaft, a double tappet mounted on the .second shaft and arranged to successively engage the tines of the forked arm, and

means arranged on the second shaft for rock' y ing the 'first lever, each half of the double tappet being capable of alonereciprocating the piston positively once, so that two reciprocations of the piston occur at each complete revolution of the double tappet.

In testimony whereof they aix their signatures.J

EMANUEL BLAUHORN. oT'ro HAJEK. 

